/Engine/Plugins/Runtime/MIDIDevice/Source/MIDIDevice/Public/MIDIDeviceManager.h
Retrieves the MIDI output device ID by name. Call "Find All MIDI Device Info" beforehand to enumerate the available output devices.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="MIDI Device Manager") static void GetMIDIOutputDeviceIDByName ( const [FString](API\Runtime\Core\Containers\FString) DeviceName, int32 & DeviceID )